The Ohio Argus Array

The Ohio Argus Array detects transient narrowband and broadband radio signals
from arbitrary locations in the sky. Ohio Argus detects narrowband radio sources,
such as orbiting satellites. Argus doesn't "point" at a satellite like a
dish-type antenna would have to. Instead, Ohio Argus detects that a signal
is "present" in the data collected from the elements of the array, and
then mathematically figures out the location of the satellite in the sky.

Ohio Argus also detects the sun, and is able to localize it accurately
in the sky. Other strong celestial sources are just outside Argus's
detection limit, however, with the possible exception of Cygnus X and
Cas A. An expanded Argus and/or more sensitive receivers will be able
to detect much fainter celestial radio sources.

But Argus is still useful at detecting local radio emitters. Take aircraft,
for example. At certain frequencies, Argus can detect some jets as they
approach and depart Port Columbus International Airport. The jets are
either broadcasting the signals detected by Argus, or they are reflecting
radio waves which are emitted from a transmitter somewhere in the general
area.

While current plans for the expansion of Argus are on hold - pending
new volunteers with RF experience ready to take charge - the volunteers
who run the day-to-day operation of the Array can benefit from additional
help in other areas. These areas include software development, spare parts
assembly and testing, fund raising, site maintenance, and other activities
not related to the Argus Array, through NAAPO,
the North American Astrophysical Observatory.